code: def sequential():
      return list(map(is_prime, PRIMES))
  
file_path: mpi4py/demo/futures/perf_primes.py
imports: import sys
  import time
  import math
  from mpi4py.futures import MPIPoolExecutor
label_desc: Use image node_id 2 for calling a global function with example usage: sequential() and returns: list